LabourList are reporting that David Cameron is twittering his reshuffle news, here. Which then led me to track down the real David Cameron and I found this. It appears that Conservative Central Office don't like people reporting on Tory policy announcements, even though they've been in the papers. Maybe it's a bit too easy to spot the inconsistencies when they're all lined up in a row? Although that site suggests now looking to @conservatives for updates, that doesn't seem to exist.